java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/array-tiling/mbpr3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 17:04:16,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 17:04:16,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 17:04:16,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-16 17:04:16,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-16 17:04:16,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-16 17:04:16,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-16 17:04:16,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-16 17:04:16,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-16 17:04:16,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-16 17:04:16,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-16 17:04:16,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-16 17:04:16,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 17:04:16,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 17:04:16,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 17:04:16,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 17:04:16,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 17:04:16,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 17:04:16,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 17:04:16,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 17:04:16,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 17:04:16,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 17:04:16,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 17:04:16,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 17:04:16,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-16 17:04:16,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-16 17:04:16,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-16 17:04:16,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-16 17:04:16,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-16 17:04:16,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-16 17:04:16,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-16 17:04:16,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-16 17:04:16,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-16 17:04:16,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-16 17:04:16,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-16 17:04:16,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-16 17:04:16,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-16 17:04:16,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-16 17:04:16,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 17:04:16,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 17:04:16,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 17:04:16,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-16 17:04:16,109 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 17:04:16,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 17:04:16,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-16 17:04:16,110 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-16 17:04:16,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-16 17:04:16,111 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-16 17:04:16,111 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-16 17:04:16,112 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-16 17:04:16,112 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-16 17:04:16,112 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-16 17:04:16,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 17:04:16,113 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 17:04:16,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 17:04:16,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 17:04:16,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 17:04:16,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 17:04:16,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 17:04:16,114 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 17:04:16,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 17:04:16,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 17:04:16,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 17:04:16,115 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-16 17:04:16,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 17:04:16,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:04:16,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 17:04:16,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 17:04:16,116 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-16 17:04:16,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 17:04:16,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 17:04:16,117 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-16 17:04:16,146 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 17:04:16,159 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 17:04:16,163 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 17:04:16,164 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 17:04:16,165 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 17:04:16,166 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr3.c [2019-09-16 17:04:16,230 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b32dfb3bf/b192225f1ef04871a6e688d40abc5ccf/FLAG065845b4f [2019-09-16 17:04:16,689 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 17:04:16,690 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr3.c [2019-09-16 17:04:16,698 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b32dfb3bf/b192225f1ef04871a6e688d40abc5ccf/FLAG065845b4f [2019-09-16 17:04:17,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b32dfb3bf/b192225f1ef04871a6e688d40abc5ccf [2019-09-16 17:04:17,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 17:04:17,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 17:04:17,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 17:04:17,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 17:04:17,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 17:04:17,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:04:17" (1/1) ... [2019-09-16 17:04:17,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e5baefa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:17, skipping insertion in model container [2019-09-16 17:04:17,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:04:17" (1/1) ... [2019-09-16 17:04:17,127 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 17:04:17,160 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 17:04:17,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:04:17,453 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 17:04:17,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:04:17,605 INFO L192 MainTranslator]: Completed translation [2019-09-16 17:04:17,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:17 WrapperNode [2019-09-16 17:04:17,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 17:04:17,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 17:04:17,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 17:04:17,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 17:04:17,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:17" (1/1) ... [2019-09-16 17:04:17,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:17" (1/1) ... [2019-09-16 17:04:17,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:17" (1/1) ... [2019-09-16 17:04:17,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:17" (1/1) ... [2019-09-16 17:04:17,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:17" (1/1) ... [2019-09-16 17:04:17,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:17" (1/1) ... [2019-09-16 17:04:17,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:17" (1/1) ... [2019-09-16 17:04:17,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 17:04:17,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 17:04:17,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 17:04:17,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 17:04:17,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:04:17,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 17:04:17,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 17:04:17,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 17:04:17,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 17:04:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 17:04:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-16 17:04:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 17:04:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-16 17:04:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 17:04:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-16 17:04:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-16 17:04:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-16 17:04:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-16 17:04:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 17:04:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 17:04:18,114 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 17:04:18,115 INFO L283 CfgBuilder]: Removed 4 assume(true) statements. [2019-09-16 17:04:18,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:04:18 BoogieIcfgContainer [2019-09-16 17:04:18,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 17:04:18,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 17:04:18,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 17:04:18,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 17:04:18,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 05:04:17" (1/3) ... [2019-09-16 17:04:18,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f11bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:04:18, skipping insertion in model container [2019-09-16 17:04:18,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:17" (2/3) ... [2019-09-16 17:04:18,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f11bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:04:18, skipping insertion in model container [2019-09-16 17:04:18,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:04:18" (3/3) ... [2019-09-16 17:04:18,125 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr3.c [2019-09-16 17:04:18,135 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 17:04:18,143 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 17:04:18,165 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 17:04:18,192 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 17:04:18,192 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-16 17:04:18,193 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 17:04:18,193 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 17:04:18,193 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 17:04:18,193 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 17:04:18,194 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 17:04:18,194 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 17:04:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-09-16 17:04:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-16 17:04:18,217 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:04:18,218 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:04:18,220 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:04:18,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:04:18,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1164915713, now seen corresponding path program 1 times [2019-09-16 17:04:18,227 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:04:18,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:18,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:04:18,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:18,286 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:04:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:04:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:04:18,403 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:04:18,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-16 17:04:18,404 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:04:18,410 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 17:04:18,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 17:04:18,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:04:18,428 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-09-16 17:04:18,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:04:18,448 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2019-09-16 17:04:18,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 17:04:18,450 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2019-09-16 17:04:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:04:18,460 INFO L225 Difference]: With dead ends: 40 [2019-09-16 17:04:18,460 INFO L226 Difference]: Without dead ends: 34 [2019-09-16 17:04:18,462 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:04:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-16 17:04:18,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-09-16 17:04:18,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-16 17:04:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-09-16 17:04:18,499 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2019-09-16 17:04:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:04:18,499 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-09-16 17:04:18,500 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 17:04:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-09-16 17:04:18,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-16 17:04:18,501 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:04:18,501 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:04:18,502 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:04:18,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:04:18,502 INFO L82 PathProgramCache]: Analyzing trace with hash 208061977, now seen corresponding path program 1 times [2019-09-16 17:04:18,502 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:04:18,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:18,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:04:18,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:18,505 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:04:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:04:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:04:18,642 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:04:18,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-16 17:04:18,642 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:04:18,646 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 17:04:18,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 17:04:18,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-16 17:04:18,648 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2019-09-16 17:04:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:04:18,723 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-09-16 17:04:18,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-16 17:04:18,724 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-16 17:04:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:04:18,725 INFO L225 Difference]: With dead ends: 40 [2019-09-16 17:04:18,725 INFO L226 Difference]: Without dead ends: 40 [2019-09-16 17:04:18,726 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-16 17:04:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-16 17:04:18,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-16 17:04:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-16 17:04:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2019-09-16 17:04:18,735 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 20 [2019-09-16 17:04:18,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:04:18,735 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2019-09-16 17:04:18,736 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 17:04:18,736 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2019-09-16 17:04:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-16 17:04:18,737 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:04:18,737 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:04:18,737 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:04:18,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:04:18,738 INFO L82 PathProgramCache]: Analyzing trace with hash 209909019, now seen corresponding path program 1 times [2019-09-16 17:04:18,738 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:04:18,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:18,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:04:18,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:18,741 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:04:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:04:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:04:18,993 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:04:18,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-16 17:04:18,994 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:04:18,994 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-16 17:04:18,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-16 17:04:18,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-16 17:04:18,995 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 4 states. [2019-09-16 17:04:19,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:04:19,101 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-09-16 17:04:19,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-16 17:04:19,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-09-16 17:04:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:04:19,106 INFO L225 Difference]: With dead ends: 43 [2019-09-16 17:04:19,106 INFO L226 Difference]: Without dead ends: 43 [2019-09-16 17:04:19,107 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-16 17:04:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-16 17:04:19,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-09-16 17:04:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-16 17:04:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2019-09-16 17:04:19,114 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 20 [2019-09-16 17:04:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:04:19,114 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2019-09-16 17:04:19,114 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-16 17:04:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2019-09-16 17:04:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-16 17:04:19,115 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:04:19,116 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:04:19,116 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:04:19,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:04:19,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2624448, now seen corresponding path program 1 times [2019-09-16 17:04:19,117 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:04:19,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:19,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:04:19,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:19,119 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:04:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:04:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-16 17:04:19,415 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:04:19,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-16 17:04:19,415 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:04:19,416 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 17:04:19,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 17:04:19,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-16 17:04:19,417 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 5 states. [2019-09-16 17:04:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:04:19,531 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2019-09-16 17:04:19,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 17:04:19,532 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-09-16 17:04:19,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:04:19,534 INFO L225 Difference]: With dead ends: 51 [2019-09-16 17:04:19,534 INFO L226 Difference]: Without dead ends: 51 [2019-09-16 17:04:19,534 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-16 17:04:19,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-16 17:04:19,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2019-09-16 17:04:19,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-16 17:04:19,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2019-09-16 17:04:19,540 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 24 [2019-09-16 17:04:19,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:04:19,541 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2019-09-16 17:04:19,541 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 17:04:19,541 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2019-09-16 17:04:19,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-16 17:04:19,542 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:04:19,542 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:04:19,542 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:04:19,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:04:19,543 INFO L82 PathProgramCache]: Analyzing trace with hash -342662518, now seen corresponding path program 1 times [2019-09-16 17:04:19,543 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:04:19,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:19,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:04:19,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:19,545 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:04:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:04:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-16 17:04:19,628 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:04:19,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-16 17:04:19,628 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:04:19,629 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 17:04:19,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 17:04:19,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 17:04:19,629 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 3 states. [2019-09-16 17:04:19,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:04:19,645 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2019-09-16 17:04:19,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 17:04:19,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-16 17:04:19,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:04:19,647 INFO L225 Difference]: With dead ends: 42 [2019-09-16 17:04:19,647 INFO L226 Difference]: Without dead ends: 42 [2019-09-16 17:04:19,648 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 17:04:19,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-16 17:04:19,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-16 17:04:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-16 17:04:19,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-09-16 17:04:19,653 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 32 [2019-09-16 17:04:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:04:19,653 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-09-16 17:04:19,653 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 17:04:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-09-16 17:04:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-16 17:04:19,654 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:04:19,655 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:04:19,655 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:04:19,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:04:19,655 INFO L82 PathProgramCache]: Analyzing trace with hash 358402060, now seen corresponding path program 1 times [2019-09-16 17:04:19,656 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:04:19,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:19,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:04:19,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:19,657 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:04:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:04:20,266 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2019-09-16 17:04:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:04:20,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:04:20,883 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:04:20,884 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2019-09-16 17:04:20,886 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [8], [12], [18], [20], [23], [27], [29], [33], [39], [41], [44], [48], [50], [54], [60], [62], [67], [69], [71], [75], [83], [88], [103], [106], [108], [114], [115], [116], [118] [2019-09-16 17:04:20,926 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-16 17:04:20,927 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-16 17:04:21,002 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-16 17:04:21,004 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 22 root evaluator evaluations with a maximum evaluation depth of 2. Performed 22 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Never found a fixpoint. Largest state had 34 variables. [2019-09-16 17:04:21,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:04:21,009 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-16 17:04:21,050 INFO L227 lantSequenceWeakener]: Weakened 5 states. On average, predicates are now at 96.67% of their original sizes. [2019-09-16 17:04:21,050 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-16 17:04:21,054 INFO L420 sIntCurrentIteration]: We unified 31 AI predicates to 31 [2019-09-16 17:04:21,054 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-16 17:04:21,055 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-16 17:04:21,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [15] total 16 [2019-09-16 17:04:21,056 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:04:21,056 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 17:04:21,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 17:04:21,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 17:04:21,057 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 3 states. [2019-09-16 17:04:21,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:04:21,059 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2019-09-16 17:04:21,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 17:04:21,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-16 17:04:21,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:04:21,059 INFO L225 Difference]: With dead ends: 7 [2019-09-16 17:04:21,060 INFO L226 Difference]: Without dead ends: 0 [2019-09-16 17:04:21,060 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 17:04:21,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-16 17:04:21,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-16 17:04:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-16 17:04:21,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-16 17:04:21,061 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2019-09-16 17:04:21,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:04:21,061 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-16 17:04:21,062 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 17:04:21,062 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-16 17:04:21,062 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-16 17:04:21,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 05:04:21 BoogieIcfgContainer [2019-09-16 17:04:21,067 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 17:04:21,069 INFO L168 Benchmark]: Toolchain (without parser) took 3965.22 ms. Allocated memory was 132.1 MB in the beginning and 263.7 MB in the end (delta: 131.6 MB). Free memory was 86.7 MB in the beginning and 184.3 MB in the end (delta: -97.6 MB). Peak memory consumption was 34.0 MB. Max. memory is 7.1 GB. [2019-09-16 17:04:21,070 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 132.1 MB. Free memory is still 104.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-16 17:04:21,071 INFO L168 Benchmark]: CACSL2BoogieTranslator took 495.50 ms. Allocated memory was 132.1 MB in the beginning and 199.2 MB in the end (delta: 67.1 MB). Free memory was 86.2 MB in the beginning and 174.8 MB in the end (delta: -88.5 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2019-09-16 17:04:21,072 INFO L168 Benchmark]: Boogie Preprocessor took 61.64 ms. Allocated memory is still 199.2 MB. Free memory was 174.8 MB in the beginning and 172.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2019-09-16 17:04:21,073 INFO L168 Benchmark]: RCFGBuilder took 448.11 ms. Allocated memory is still 199.2 MB. Free memory was 172.6 MB in the beginning and 152.7 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2019-09-16 17:04:21,074 INFO L168 Benchmark]: TraceAbstraction took 2949.99 ms. Allocated memory was 199.2 MB in the beginning and 263.7 MB in the end (delta: 64.5 MB). Free memory was 152.7 MB in the beginning and 184.3 MB in the end (delta: -31.5 MB). Peak memory consumption was 32.9 MB. Max. memory is 7.1 GB. [2019-09-16 17:04:21,078 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 132.1 MB. Free memory is still 104.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 495.50 ms. Allocated memory was 132.1 MB in the beginning and 199.2 MB in the end (delta: 67.1 MB). Free memory was 86.2 MB in the beginning and 174.8 MB in the end (delta: -88.5 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.64 ms. Allocated memory is still 199.2 MB. Free memory was 174.8 MB in the beginning and 172.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 448.11 ms. Allocated memory is still 199.2 MB. Free memory was 172.6 MB in the beginning and 152.7 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2949.99 ms. Allocated memory was 199.2 MB in the beginning and 263.7 MB in the end (delta: 64.5 MB). Free memory was 152.7 MB in the beginning and 184.3 MB in the end (delta: -31.5 MB). Peak memory consumption was 32.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 1 error locations. SAFE Result, 2.8s OverallTime, 6 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 178 SDtfs, 152 SDslu, 150 SDs, 0 SdLazy, 110 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9569892473118279 AbsIntWeakeningRatio, 0.9354838709677419 AbsIntAvgWeakeningVarsNumRemoved, 0.5161290322580645 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 13 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 148 NumberOfCodeBlocks, 148 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 33812 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 4/7 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...